9917900 has 54 divisors (see below), whose sum is σ = 22433460. Its totient is φ = 3804800.

The previous prime is 9917891. The next prime is 9917903. The reversal of 9917900 is 97199.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (9917903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 168071 + ... + 168129.

Almost surely, 2^9917900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9917900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11216730).

9917900 is an abundant number, since it is smaller than the sum of its proper divisors (12515560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9917900 is a wasteful number, since it uses less digits than its factorization.

9917900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 5103, while the sum is 35.

The square root of 9917900 is about 3149.2697566261. The cubic root of 9917900 is about 214.8522511127.

The spelling of 9917900 in words is "nine million, nine hundred seventeen thousand, nine hundred".